Glaciichnium liebegastensis Walter, 1985

Description. Straight to winding convex forms on the upper parting surfaces and concave forms on the lower parting surfaces, composed of a central groove or ridge bounded by disrupted levee, 0.3–1.2 mm wide. The groove is accompanied by very thin, short (up to 1.5 mm long) lateral groves or ridges, inclined concordantly at an angle up to 45° to the main course of the trace fossil. In some specimens the lateral grooves or ridges are poorly visible, and only the central axial part
is preserved. In other specimens the central groove is poorly preserved and the lateral elements dominate.
Remarks. This is a typical trackway of an arthropod with drag marks, which is commonly preserved in different ways as under tracks, i.e. impressions of appendages on lower laminae (cf. Goldring & Seilacher, 1971).